Commander Tartar Inkling Ender

Indestructible, Sanitation (When this creature
deals combat damage to another creature, put a
-1/-1 counter on that creature if it had a +1/+1
counter on it.)
{t}: Destroy each Inkling and Octoling with a
-1/-1 counter on it.
Commander Tartar Inkling Ender's power is
equal to the number of Inklings and Octolings in
all graveyards.